Air duct structure and range hood

Abstract

The present application relates to the technical field of range hood, provide a kind of air duct structure and range hood, air duct structure includes: cabinet and rectifier convex, cabinet is internally configured with gas flow-through space;Rectifier convex is connected with cabinet and is located gas flow-through space, and rectifier convex and the sidewall between cabinet form first gas flow channel;Along the direction of airflow, the cross-sectional dimension of first gas flow channel gradually increases.By the above-mentioned mode, the air pressure when smoke gas flows from fan assembly to first gas flow channel in the present application is larger, and the speed of smoke gas flow is also higher, and then it is favorable for more smoke gas to pass through first gas flow channel, so that the suction capacity of fan assembly can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of range hood, in particular to a wind channel structure and a range hood. BACKGROUND

[0002] With the improvement of people's living standards, range hoods are gradually popularized in ordinary families, and people's requirements for range hoods are also getting higher and higher, which in turn promotes the development of range hoods.

[0003] The most important function of the range hood is to suck and exhaust oil fume, and the existing range hood has general smoke suction and exhaust effect, especially in the case of more smoke, the existing range hood cannot realize rapid absorption and transportation of smoke, and the suction and exhaust effect of oil fume cannot meet the user's demand. SUMMARY

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application provides a wind channel structure, which realizes active pressurization by setting a gradually expanding first gas flow channel, thereby improving the suction capacity of the range hood.

[0005] The present application also provides a range hood.

[0006] According to the wind channel structure of the first aspect of the present application, comprising:

[0007] The box body is internally structured with a gas flow space;

[0008] The flow regulating convex is connected with the box body and located in the gas flow space, and the first gas flow channel is formed between the flow regulating convex and the side wall of the box body.

[0009] In the airflow direction, the cross-sectional size of the first gas flow channel gradually increases.

[0010] According to the wind channel structure of the present application, the flow regulating convex and the side wall of the box body form an independent first gas flow channel for the flow of the sucked smoke, and in the airflow direction, the cross-sectional size of the first gas flow channel increases, so that the flow rate of the oil fume is increased when the smoke enters the first gas flow channel, so as to improve the flow rate of the smoke entering the first gas flow channel. With the flow of the smoke in the first gas flow channel, the speed will decrease, but the cross-sectional size of the first gas flow channel increases, and the first gas flow channel can accommodate more smoke, which is convenient for the transportation of the smoke.

[0011] According to one embodiment of the present application,

[0012] The box body is provided with a first air inlet on the air inlet side, which is in communication with the gas flow space;

[0013] A fan assembly is arranged in the gas flow passage and corresponds to the first air inlet, and is configured to supply air to the first gas flow passage through the first air inlet.

[0014] According to an embodiment of the present application,

[0015] The box includes a guide plate and a first side plate corresponding to the guide plate, and a first air inlet is arranged on the guide plate.

[0016] The first side plate and the rectifying convex block form the first gas flow passage.

[0017] According to an embodiment of the present application,

[0018] The rectifying convex block includes a first receiving plate, a second receiving plate arranged at an angle with the first receiving plate, a third receiving plate connected to the second receiving plate, and a fourth receiving plate connected to the third receiving plate and the first receiving plate, respectively.

[0019] The second receiving plate corresponds to the first side plate, and the fourth receiving plate is attached to the guide plate.

[0020] According to an embodiment of the present application,

[0021] The third receiving plate and the first side plate form a mounting space connected to the first gas flow passage, and the fan assembly is arranged in the mounting space.

[0022] In the direction of the air flow from the first air inlet to the fan assembly, the cross-sectional size of the mounting space decreases.

[0023] According to an embodiment of the present application,

[0024] The first receiving plate, the second receiving plate, the third receiving plate, and the fourth receiving plate enclose a sound attenuation cavity.

[0025] The second receiving plate is provided with a second sound attenuation module on the side facing the sound attenuation cavity.

[0026] According to an embodiment of the present application, the guide plate is further provided with a second air inlet arranged at a distance from the first air inlet, and the second air inlet is arranged above the first air inlet and connected to the gas flow passage.

[0027] According to an embodiment of the present application,

[0028] The guide plate and the first receiving plate form a second gas flow passage.

[0029] The first receiving plate is arranged towards the second gas flow channel, and a side of the first receiving plate towards the sound attenuation cavity is provided with a first sound attenuation module.

[0030] According to one embodiment of the present application,

[0031] The first gas flow channel and the second gas flow channel converge at a side away from the rectifying convex and leave the gas flow space.

[0032] The first gas flow channel and the second gas flow channel respectively leave the gas flow space.

[0033] According to the range hood of the second aspect embodiment of the present application, the air duct structure is included, and all the technical effects of the air duct structure are not repeated here.

[0034] The one or more technical solutions in the embodiments of the present application have at least one of the following technical effects:

[0035] The rectifying convex and the box form the first gas flow channel, and the cross-sectional size of the first gas flow channel increases along the airflow direction, so that the flue gas actively increases and the flow rate becomes fast when entering the first gas flow channel, thereby improving the conveying efficiency of the flue gas.

[0036] Further, the rectifying convex can separate the first gas flow channel and the second gas flow channel, so that the first gas flow channel and the second gas flow channel can independently intake gas, and the rectifying convex can suck and attenuate the gas in the first gas flow channel and the second gas flow channel, thereby effectively reducing the noise of the user.

[0037] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following description, or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0039] Figure 1 is a structural schematic diagram of a range hood provided by the embodiments of the present application;

[0040] Figure 2 is Figure 1 the explosion structure schematic diagram shown in the figure;

[0041] Figure 3 is Figure 1partially shown internal structure view;

[0042] Figure 4 is Figure 3 another angle shown internal structure view;

[0043] Figure 5 is the flow structure diagram of the air duct structure of the embodiment of the application;

[0044] Figure 6 Figure 5 sectional view at A-A shown;

[0045] Figure 7 is Figure 6 enlarged structure schematic view at B shown;

[0046] Figure 8 is Figure 5 structure schematic view of the rectifying convex shown;

[0047] Figure 9 is Figure 8 internal structure view of the rectifying convex shown;

[0048] Figure 10 is Figure 1 structure schematic view of the first state of the extractor hood shown;

[0049] Figure 11 is Figure 1 structure schematic view of the second state of the extractor hood shown;

[0050] Figure 12 is Figure 1 structure schematic view of the third state of the extractor hood shown;

[0051] Figure 13 is Figure 12 structure schematic view of one angle of the filter screen assembly shown;

[0052] Figure 14 is Figure 13 exploded structure view of the filter screen assembly shown;

[0053] Figure 15 is Figure 12 structure schematic view of another angle of the filter screen assembly shown;

[0054] Figure 16 is Figure 15 enlarged structure schematic view at L shown;

[0055] Figure 17 is Figure 15 structure schematic view of the outer frame shown;

[0056] Figure 18is Figure 17 enlarged structural schematic view at F shown in FIG. 1;

[0057] Reference signs:

[0058] 10, box; 110, gas flow space; 120, gas inlet side; 1210, guide plate; 130, first gas inlet; 140, first gas flow channel; 150, second gas inlet; 160, guide plate; 170, second gas flow channel; 180, mounting space; 190, initial gas inlet flow channel; 1910, first side plate;

[0059] 20, rectifier convex; 210, first receiving plate; 2110, first sound attenuation module; 220, second receiving plate; 2210, second sound attenuation module; 230, third receiving plate; 240, fourth receiving plate; 250, sound attenuation cavity;

[0060] 30, fan assembly; 310, motor; 320, impeller; 330, bent plate;

[0061] 40, centrifugal fan;

[0062] 50, check valve;

[0063] 60, filter screen assembly; 610, first filter unit; 620, second filter unit; 630, inner frame; 6310, clamping portion; 6320, limiting plate; 640, outer screen; 6410, guide portion; 6420, gas inlet hole; 6430, mounting plate; 6450, flow gap; 650, inner screen; 6510, filter hole;

[0064] 70, rack assembly. DETAILED DESCRIPTION

[0065] The embodiments of the present application will be further described below in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0066] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0067] The oil fume extractor provided by the embodiment of the present application comprises a wind channel structure, which is used for conveying the oil fume to be sucked in during the use of the oil fume extractor, so that the smoke does not scatter randomly during the use of the oil fume extractor.

[0068] Figures 1 to 5 In an embodiment of the present application, the wind channel structure comprises a box body 10, a rectifying convex 20 arranged in the box body 10, a fan assembly 30 arranged in the box body 10, a centrifugal fan 40 arranged in the box body 10, a check valve 50 connected with the box body 10, the smoke to be sucked in is sucked into the box body 10 by the fan assembly 30, sequentially flows through the centrifugal fan 40 and the check valve 50, and then the conveying of the smoke is realized, and the wind channel structure further comprises a rack assembly 70, which is sleeved outside the centrifugal fan 40.

[0069] Please continue to refer to 5, specifically, the gas flow space 110 is arranged in the box body 10, one side of the box body 10 corresponds to the air inlet side 120, the box body 10 is provided with a guide plate 1210 corresponding to the air inlet side 120. In an embodiment of the present application, the guide plate 1210 is arranged obliquely. The box body 10 is provided with a first air inlet 130 corresponding to the gas flow space 110 at the guide plate 1210, the fan assembly 30 is arranged close to the first air inlet 130, and the air inlet of the fan assembly 30 corresponds to the first air inlet 130, so that the fan assembly 30 sucks in the external smoke through the first air inlet 130.

[0070] The rectifying convex 20 is arranged in the gas flow space 110 and close to the fan assembly 30, the box body 10 comprises a first side plate 1910 arranged corresponding to the guide plate 1210, a first gas flow channel 140 is formed between one side of the rectifying convex 20 and the first side plate 1910, the air outlet of the fan assembly 30 is communicated with the first gas flow channel 140, so that the smoke sucked in by the fan assembly 30 is conveyed to the centrifugal fan 40 through the first gas flow channel 140. In an embodiment of the present application, the circumferential dimension of the first gas flow channel 140 increases in the direction along the air outlet of the fan assembly 30, that is, the smoke is inhaled at the air inlet side of the fan assembly 30, after passing through the fan assembly 30, the fan assembly 30 actively pressurizes the smoke, so that the speed of the smoke passing through the fan assembly 30 is greater than the speed of the smoke entering the first gas flow channel 140. For example, according to the same flow of the smoke in unit time, when the circumferential dimension of the first gas flow channel 140 close to the fan assembly 30 is small, the flow rate of the oil fume at this position will increase, so that the smoke can quickly pass through the first gas flow channel 140 and be conveyed through the centrifugal fan 40 and the check valve 50. This is conducive to improving the conveying capacity of the fan assembly 30 to the smoke. It should be noted that the first gas flow channel 140 is independently arranged, that is, the fan assembly 30 forms an independent air inlet channel at the first air inlet 130 side.

[0071] Please continue to refer toFigure 5 and Figure 6 The fan assembly 30 comprises a motor 310 and an impeller 320 connected with the motor 310, and the impeller 320 is used to deliver the flue gas through the first air inlet 130 to the first gas flow channel 140. In an embodiment of the present application, the fan is a cross-flow fan. The impeller 320 generates low noise during operation, thereby meeting the requirement of noise reduction of the range hood.

[0072] Please continue to refer to Figure 2 and Figure 5 In an embodiment of the present application, the cabinet 10 is further provided with a second air inlet 150 on the side of the guide plate 1210, which is spaced apart from the first air inlet 130 and is arranged above the first air inlet 130 and communicates with the gas flow space 110.

[0073] That is, the flue gas can enter the gas flow space 110 through the first air inlet 130 and the second air inlet 150. The cabinet 10 is further provided with a guide plate 160 slidingly connected with the cabinet 10, and the guide plate 160 is used to control the air inlet area of the second air inlet 150. It should be noted that when the back pressure in the gas flow space 110 is low, the external gas pressure is not much different from the gas pressure in the gas flow space 110, that is, the amount of external flue gas is large, at this time, the air inlet area of the second air inlet 150 can be adjusted to the maximum, thereby increasing the amount of flue gas entering through the first air inlet 130 and the second air inlet 150. Conversely, when the pressure difference between the gas pressure in the gas flow space 110 and the external gas pressure is large, that is, the amount of external flue gas is small, at this time, most of the flue gas is sucked in through the fan assembly 30, thereby the gas pressure in the gas flow space 110 is greater than the external gas pressure, and the air inlet area of the second air inlet 150 can be reduced or closed, so as to maintain the absorption of flue gas by the fan assembly 30, thereby enhancing the smoke absorption effect. It should be noted that the flue gas can enter the gas flow space 110 through the first air inlet 130 and the second air inlet 150, and then be absorbed. The gas flow corresponding to the first air inlet 130 and the gas flow corresponding to the second air inlet 150 can be independent. That is, the flue gas entering through the first air inlet 130 and the flue gas entering through the second air inlet 150 can be in a merged state when leaving the cabinet 10 and flowing to the centrifugal fan 40. They can also leave the cabinet 10 and flow to the centrifugal fan 40 respectively.

[0074] Specifically, please continue to refer to Figures 10 to 12 The air inlet area of the second air inlet 150 provided in the present application is adjustable, thereby corresponding to the conditions of more flue gas, normal flue gas and less flue gas, and also corresponding to the conditions of the second air inlet 150 being completely opened, the second air inlet 150 being partially opened and the second air inlet 150 being closed.

[0075] Specifically, the first air pressure detection assembly can be arranged outside the guide plate 1210 of the box body 10, and the second air pressure detection assembly can be arranged inside the gas flow space 110 and close to the second air inlet 150 side. The intake area of the second air inlet 150 is adjusted by the difference between the second air pressure detection assembly and the first air pressure detection assembly.

[0076] Please continue to refer to Figure 5 , Figure 8 and Figure 9 , after the flue gas enters the gas flow space 110, part of it enters the sound-absorbing convex 20 for sound absorption. In an embodiment of the present application, the sound-absorbing convex 20 includes a first receiving plate 210 and a second receiving plate 220 arranged at an angle with the first receiving plate 210, the first receiving plate 210 and the box body 10 form a second gas flow channel 170, the second receiving plate 220 and the box body 10 form a first gas flow channel 140, and the first gas flow channel 140 and the second gas flow channel 170 are independent flow channels. The gas in the first gas flow channel 140 and the gas in the second gas flow channel 170 are mixed at the centrifugal fan 40 and finally transported outward through the check valve 50.

[0077] Please continue to refer to Figure 8 and Figure 9 , it should be noted that the sound-absorbing convex 20 further includes a third receiving plate 230 connected to the second receiving plate 220 and arranged at an angle, the third receiving plate 230 is connected to the inner wall of the guide plate 1210 of the box body 10, and the sound-absorbing convex 20 further includes a fourth receiving plate 240 connected to the third receiving plate 230 and the first receiving plate 210 respectively, the fourth receiving plate 240 is attached to the inner wall of the air inlet side 120 of the box body 10. In an embodiment of the present application, the fourth receiving plate 240 can be connected to the box body 10 by screws, adhesion, or buckle connection, which is not limited herein.

[0078] The first receiving plate 210, the second receiving plate 220, the third receiving plate 230, and the fourth receiving plate 240 form a sound-absorbing cavity 250, which is used for receiving the gas in the first gas flow channel 140 and the second gas flow channel 170 and absorbing sound.

[0079] Specifically, the first receiving plate 210 is provided with a first sound-absorbing module 2110 on the side facing the sound-absorbing cavity 250, and the second receiving plate 220 is provided with a second sound-absorbing module 2210 on the side facing the sound-absorbing cavity 250, that is, the gas in the first gas flow channel 140 can pass through the second receiving plate 220 and the second sound-absorbing module 2210 to enter the sound-absorbing cavity 250, and the gas in the second gas flow channel 170 can pass through the first receiving plate 210 and the first sound-absorbing module 2110 to enter the sound-absorbing cavity 250.

[0080] In an embodiment of the present application, the third receiving plate 230 and the box body 10 form a mounting space 180, the fan assembly 30 is arranged in the mounting space 180, and the mounting space 180 has a larger circumferential dimension on the side close to the air inlet of the fan assembly 30 than on the side close to the air outlet of the fan assembly 30. The initial air inlet flow channel 190 is formed in the direction in which the flue gas flows to the fan assembly 30 through the first air inlet 130. The circumferential dimension of the initial air inlet flow channel 190 decreases in the direction from the first air inlet 130 to the air outlet of the fan assembly 30. It should be noted that the cross-sectional dimension of the initial air inlet flow channel 190 on the side close to the first air inlet 130 is larger than that on the side close to the air inlet of the fan assembly 30. Thus, the space in the mounting space 180 for sucking and storing flue gas is larger, and the air pressure on the outlet side of the fan assembly 30 is stronger when the fan assembly 30 operates, so that the flue gas can pass through the first gas flow channel 140 at a faster speed, thereby improving the pressure boosting effect of the fan assembly 30.

[0081] Please continue to refer to Figure 5 In an embodiment of the present application, the third receiving plate 230 further has a bent plate 330 on one side, one end of the bent plate 330 is connected to the third receiving plate 230, and the other end is connected to the inner side wall of the air inlet side 120 of the box body 10. The bent plate 330 and the box body 10 form the initial air inlet flow channel 190. The bent plate 330 is arranged obliquely, so that the circumferential dimension of the initial air inlet flow channel 190 decreases in the direction from the first air inlet 130 to the air outlet of the fan assembly 30. That is, the circumferential dimension of the first air inlet 130 is larger, which is suitable for sucking a large amount of flue gas. During the movement towards the fan assembly 30, the flow speed of the flue gas increases with the decrease of the flow space, that is, the fan assembly 30 actively expands the pressure, increases the flow speed of the flue gas, and thus facilitates the delivery of the flue gas by the fan assembly 30.

[0082] Please continue to refer to Figures 13 to 18 In an embodiment of the present application, the filter screen assembly 60 further includes a first filter unit 610 and a second filter unit 620. The first filter unit 610 is arranged on the first air inlet 130, and the second filter unit 620 is arranged on the second air inlet 150. That is, the flue gas passes through the first filter unit 610 and the second filter unit 620 when entering the gas flow space 110, and thus the first filter unit 610 and the second filter unit 620 filter the oil stains in the flue gas.

[0083] Please continue to refer to Figure 13 and Figure 14, the filter screen assembly 60 comprises an inner frame 630, an outer screen 640 connected with the inner frame 630, and an inner screen 650 arranged between the inner frame 630 and the outer screen 640, and the flue gas passes through the outer screen 640 and then passes through the inner screen 650, the inner screen 650 can filter the oil fume and collect the condensed oil fume in the oil groove arranged on the outer screen 640 for unified and centralized collection. In an embodiment of the present application, the inner frame 630 and the outer screen 640 are snap-connected, that is, at least one snap part 6310 is arranged on the inner frame 630, and at least one guide part 6410 corresponding to the snap part 6310 is arranged on the outer screen 640, and the inner frame 630 is sleeved in the outer screen 640 and the snap part 6310 is snap-connected with the guide part 6410.

[0084] Please continue to refer to Figure 14 、 Figure 15 and Figure 16 , specifically, a plurality of air inlet holes 6420 are arranged on the outer screen 640, and the outer screen 640 is provided with a mounting cavity for placing the inner screen 650. The circumferential side of the mounting cavity corresponds to a plurality of mounting plates 6430, and at least one guide part 6410 is arranged on the mounting plate 6430, and the guide part 6410 is an arc-shaped plate. A limiting plate 6320 corresponding to the mounting plate 6430 is arranged on the inner frame 630, and when the inner frame 630 is sleeved in the mounting cavity, the limiting plate 6320 abuts against the side surface of the mounting plate 6430 facing the mounting cavity. At least one snap part 6310 is arranged on the limiting plate 6320 of the inner frame 630, and the snap part 6310 is also arranged in an arc shape, so that when the inner frame 630 is embedded in the mounting cavity, the snap part 6310 is snap-connected with the guide part 6410.

[0085] In an embodiment of the present application, the inner screen 650 is corrugated, and a plurality of filter holes 6510 are uniformly arranged on the inner screen 650, and the shape of the filter hole 6510 is preferably rhombic. In other embodiments, the shape of the inner screen 650 can also be arranged in a broken line, and the shape of the filter hole 6510 can also be circular or triangular, etc., which is not limited herein. In an embodiment of the present application, the filter screen is arranged in one layer. For areas with large amount of flue gas, such as restaurant kitchens, etc., multiple layers of filter screens can be arranged to filter the oil fume, thereby improving the filtering efficiency of the filter screen, and the number of layers of the filter screen can be adjusted according to the environment used.

[0086] Please continue to refer to Figure 17 and Figure 18 It can be understood that the outer screen 640 is provided with a limiting protrusion in the mounting cavity corresponding to each air inlet hole 6420, and the bending area of the inner screen 650 is snap-connected in the gap position between adjacent limiting protrusions, so that the condensed oil fume can fall into the flow gap 6450 between the limiting protrusions, and then the oil fume is collected. The collected oil fume can enter the oil cup (not shown in the figure) arranged in the box body 10 for collection.

[0087] To sum up, in the air duct structure provided by the present application, the first gas flow channel 140 is formed between the rectifying convex 20 and the side wall of the box body 10, and the air outlet of the fan assembly 30 corresponds to the first gas flow channel 140, so that the gas passing through the fan assembly 30 flows along the first gas flow channel 140, and the first gas flow channel 140 increases in the circumferential dimension in the direction away from the air outlet of the fan assembly 30. Therefore, the first gas flow channel 140 is beneficial to improve the pressurization effect of the fan assembly 30, so that the fan assembly 30 realizes active pressurization, the suction capacity of the fan assembly 30 can be improved, and at the same time, the noise radiation of the first air inlet 130 can be effectively reduced, the noise of the user can be effectively reduced, and the user experience is improved.

[0088] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0089] The above embodiments are only used to illustrate the present application, but not to limit the present application. Although the present application is described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications or equivalent replacements of the technical solutions of the present application do not deviate from the spirit and scope of the present application, and should be covered in the scope of the claims of the present application.

Claims

1. An air duct structure characterized by, The wind channel structure comprises: a box body, which is internally structured with a gas flow space; a flow regulation protrusion, which is connected to the box body and located in the gas flow space, and forms a first gas flow channel between the flow regulation protrusion and the side wall of the box body; the cross-sectional size of the first gas flow channel gradually increases in the airflow direction; the box body comprises a guide plate and a first side plate corresponding to the guide plate, the flow regulation protrusion comprises a first receiving plate, a second receiving plate arranged at an angle with the first receiving plate, a third receiving plate connected to the second receiving plate, and a fourth receiving plate connected to the third receiving plate and the first receiving plate respectively; the second receiving plate corresponds to the first side plate, and the fourth receiving plate is attached to the guide plate; the first receiving plate, the second receiving plate, the third receiving plate, and the fourth receiving plate enclose a sound attenuation cavity; the second receiving plate is provided with a second sound attenuation module on the side facing the sound attenuation cavity; the guide plate and the first receiving plate form a second gas flow channel; the first receiving plate is arranged towards the second gas flow channel, and the first receiving plate is provided with a first sound attenuation module on the side facing the sound attenuation cavity.

2. The wind channel structure according to claim 1, wherein the box body is provided with a first air inlet on the air inlet side, which communicates with the gas flow space; further comprising a fan assembly arranged in the gas flow space, which corresponds to the first air inlet and is used to supply air to the first gas flow channel through the first air inlet.

3. The air duct structure according to claim 2, wherein The first air inlet is arranged on the guide plate; the flow regulation protrusion and the first side plate form the first gas flow channel at an angle on the side facing the first side plate.

4. The air duct structure according to claim 3, wherein The third receiving plate and the first side plate form a mounting space which communicates with the first gas flow channel, and the fan assembly is arranged in the mounting space; in the airflow direction from the first air inlet to the fan assembly, the cross-sectional size of the mounting space decreases.

5. The air duct structure according to claim 3, wherein The guide plate is further provided with a second air inlet arranged at a distance from the first air inlet, which is arranged above the first air inlet and communicates with the gas flow space.

6. The air duct structure according to claim 1, wherein The first gas flow channel and the second gas flow channel converge on the side away from the flow regulation protrusion and leave the gas flow space; or the first gas flow channel and the second gas flow channel respectively leave the gas flow space.

7. A range hood characterized by The wind channel structure according to any one of claims 1 to 6.

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